Doctors have issued a health warning for the snug-fitting denim after a woman in Australia passed out on a sidewalk because her calves had dangerously swelled up.

BBC News reports that the 35-year-old woman had to be cut out of her skinny jeans that she had been wearing for hours while helping a friend move. Dr. Thomas Kimber notes in the Journal of Neurology, Neurosurgery and Psychiatry that the hours of squatting and kneeling caused her calves to balloon in size, eventually leaving her feet numb and making it difficult to walk.

After spending four days in the hospital, the woman has recovered. Kimber says tight pants with more elasticity wouldn't be as dangerous since they don't squeeze nerves and muscles quite as much.

So if you're thinking of trading in your tight jeans for sweatpants now, doctors say it's unnecessary. You can still wear skinny jeans, just try to avoid activities what require a lot of squatting while wearing them.